JPS613978A - Refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to the structure of doors in refrigerators and freezers.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a conventional example and its problems The structure of a door in a conventional refrigerator or the like will be explained with reference to FIGS. 2 to 4. A handle 2 is fastened with screws to a door member 1 made of a painted steel plate, and a foamed insulating material 3 made of hard foamed urethane resin is closely placed on the back side of the door member 1, and then ABS resin and styrene resin are vacuum-coated. It is constructed by attaching a molded door back member 4.

Since the handle 2 for opening and closing the door is fastened to the door member 1 with screws, only the handle 2 protrudes from the flat door member 1 even though the door member 1 itself has a flat structure. Because the refrigerator is completed as a product and just before it is shipped from the factory, it is packaged in a synthetic resin film bag to protect it from scratches and dents during handling, transportation, warehouse storage, etc. It is wrapped in a cardboard box with a cushioning material such as foamed polystyrene resin, and then packed in a wooden frame, so it can be wrapped in 3 to 4 layers. The required amount of packaging material is larger than if the handle 2 does not protrude or only protrudes to a smaller extent, resulting in a wasteful product that results in a so-called material-intensive packaging.・The cumulative volume of the number of product refrigerators that can be accommodated per freight vehicle increased due to the presence of the protrusion.
The amount will be reduced by the same amount as the volume, and the warehouse storage stage will be the same as the transportation stage.

It had such major drawbacks.

On the other hand, if the wall thickness of the insulating material 4 is reduced by providing a recessed part in the door member of the attachment part of the handle 2 while maintaining the heat conduction of the insulating material 4, thermal energy from outside the refrigerator will enter through the recessed part. This results in a refrigerator that consumes a lot of electricity, and on top of that, during the rainy season when the humidity is extremely high, the concave part of the door member cools down due to the leakage of cold heat inside the refrigerator, causing moisture outside the refrigerator to condense and cause sweating. There was a problem in that it gave an unnatural appearance.

Purpose of the Invention The present invention saves three to four layers of packaging materials for refrigerators, etc., and also reduces the area and volume occupied during the transportation stage and warehouse storage stage after product shipment, thereby reducing the amount of space per unit area and volume. To provide a refrigerator and a freezer that not only increase the number of units to be transported and stored, but also reduce power consumption to the necessary minimum and eliminate sweating on a part of a door member.

In order to achieve the configuration and object of the invention, the present invention provides a recessed portion in the handle attachment portion of the door member, and makes part or all of the thickness of the insulation wall around the recessed portion more thermally conductive than the foamed insulation material. The thickness of the insulation wall at the handle attachment part is made much thinner than other parts by arranging a vacuum insulation material with a small rate over a wide width, and the distance the handle protrudes from the door member is reduced, thereby making the packaging possible. This not only saves on materials and increases the number of units transported and stored per unit area/volume during post-shipment transportation and warehousing stages, but also reduces power consumption to the necessary minimum and reduces the need for some door components. It is designed to eliminate sweating.

DESCRIPTION OF EMBODIMENTS Hereinafter, regarding an embodiment of the present invention, referring to FIG. 1, the handle 12 is fastened with a screw, and special inorganic powder fine particles 13 are applied to the back surface of the concave portion 117 with a multilayer film 14 containing a thin metal film. A reduced pressure insulating material 15 is placed in close contact with the back surface of the recessed portion 11', and a hard material is placed on the back surface of the door member 11 other than the reduced pressure insulating material 16. It has a structure in which a foamed heat insulating material 16 made of foamed urethane resin is closely placed, and a door back member 17 made of vacuum molded ABS resin or styrene resin is attached.

Here, the thermal conductivity of each of the foamed resin heat insulating material and the reduced pressure heat insulating material is shown below.

As mentioned above, the thermal conductivity of the vacuum insulation material is much lower than that of the foamed urethane resin insulation material, and has reached the No.

Therefore, since the recessed part 11' is provided in the door member, the protrusion distance of the handle 12 from the door member 11 can be much smaller than that of the conventional example, and the depth of the recessed part 11' can be reduced by the foamed heat insulating material.
6% of the wall thickness and the thermal conductivity is significantly smaller.
Since the high-performance vacuum heat insulating material 16 is disposed in the recessed portion 11', it has the effect of ensuring sufficient heat insulation of the recessed portion.

Effects of the Invention As is clear from the above explanation, the present invention greatly reduces the protrusion distance from the door member of the handle for opening and closing the door of a refrigerator, etc., and can be used as a packaging material for a refrigerator that covers 3 to 4 layers. After the product is shipped, the area and volume occupied during the transportation and warehousing stages can be reduced to reduce transportation and volume per unit area and volume.
It is possible to obtain a refrigerator and a freezer that can not only reduce the number of units stored, but also reduce power consumption to the necessary minimum and eliminate sweating on a part of the door member.

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view of main parts of a refrigerator door according to an embodiment of the present invention, Fig. 2 is a front view of a conventional door, and Fig. 3 is a second
The side view in the figure, and FIG. 4 is an enlarged sectional view in FIG. 2 1-1'. 11...Door member, 12...Handle,
15...Reduced pressure insulation material, 16...Foam insulation material, 17...Door back member. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure A Figure 3 Figure 4

Claims (1)

[Claims] The door member includes a door member to which a handle is attached to a part of the outer surface, and a door back member forming an insulating space for storing a heat insulating material between the door member and the door member, and a recessed part is provided in the handle attachment part of the door member. A refrigerator comprising a vacuum heat insulating material having a lower thermal conductivity than the foam heat insulating material housed in the heat insulating space between the concave portion of the door member and the door back member.